作 者：
刘李婷;葛武鹏;张刚亮;杨静;王雨馨;曹妮娜
单 位：
西北农林科技大学食品科学与工程学院;陕西省质量监督局;陕西杨凌质量技术检测检验所
关键词：
餐厨废油;折光率;胆固醇;脂肪酸;Na+含量
摘 要：
目的:建立有效的检测鉴别餐厨废油的方法。方法:分别以折光率、胆固醇含量、脂肪酸成分变化、Na+含量进行标志性成分的检测分析,并通过此4项指标建立一套综合评判分析体系。结果:当油样满足折光率低于1.4750,胆固醇含量超过0.1mg/g,脂肪酸相对不饱和度(U/R值)明显低于食用油或出现特征脂肪酸组分,Na+含量超过3mg/kg其中任意一项或多项吻合,即可判定为非正常食用油;气相色谱-质谱分析餐厨废油特征脂肪酸成分为12-甲基-十三碳烷酸、顺-9-十六碳烯酸以及反,反-7,10-十八碳二烯酸、反,反-8,11-十八碳二烯酸、反,反-9,11-十八碳二烯酸、反,反-9,12-十八碳二烯酸多种十八碳二烯酸反式结构组分。结论:4项指标综合判断在被检样品中准确率高达100%,能够客观真实鉴别餐厨废油与食用植物油。
译 名：
Integrated Application of Four Parameters in Discriminating Waste Cooking Oil
作 者：
LIU Li-ting;GE Wu-peng;ZHANG Gang-liang;YANG Jing;WANG Yu-xin;CAO Ni-na;College of Food Science and Engineering,Northwest A & F University;Shaanxi Bureau of Quality and Supervision;Institution of Inspection of Yangling Bureau of Quality and Supervision;
关键词：
waste cooking oil;;refraction rate;;cholesterol;;fatty acid;;Na+ content
摘 要：
Objective: To establish a valid method to discriminate waste cooking oil. Methods: This study used refractive index, cholesterol, fatty acid composition, Na+ content as indicator components to establish an integrated evaluation system for discriminant analysis of waste. Results: When oil samples had refractive index lower than 1.4750, cholesterol content more than 0.1 mg/g, fatty acid U/R value significantly lower than edible oil or with characteristic fatty acids, and Na+ content more than 3 mg/kg, they could be considered as not safe with respect to one or combinations of these parameters. At least five characteristic fatty acids for waste cooking oil were identified by GC-MS analysis. Conclusion: The accuracy of the method was 100% by using these four parameters and hence could discriminate waste cooking oil from edible vegetable oil.
